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enc->Iterator memory cleanup

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* move yuv_in_/out_* scratch buffers to iterator
* add y_top_/uv_top_ shortcuts in iterator

That's ~3k of stack size instead of heap.
But it allows having several iterators work in parallel.

Change-Id: I6a437c0f2ef1e5d398c1d6a2fd4974fa0869f0c1
This commit is contained in:
skal 2013-08-31 23:38:11 +02:00
parent e81fac86dd
commit 733a7faae4
3 changed files with 28 additions and 34 deletions
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27
src/enc/iterator.c
View File

@ -47,6 +47,8 @@ void VP8IteratorSetRow(VP8EncIterator* const it, int y) {
it->preds_ = enc->preds_ + y * 4 * enc->preds_w_;
it->nz_ = enc->nz_;
it->mb_ = enc->mb_info_ + y * enc->mb_w_;
it->y_top_ = enc->y_top_;
it->uv_top_ = enc->uv_top_;
InitLeft(it);
}
@ -64,11 +66,10 @@ void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it) {
it->enc_ = enc;
it->y_stride_ = enc->pic_->y_stride;
it->uv_stride_ = enc->pic_->uv_stride;
// TODO(later): for multithreading, these should be owned by 'it'.
it->yuv_in_ = enc->yuv_in_;
it->yuv_out_ = enc->yuv_out_;
it->yuv_out2_ = enc->yuv_out2_;
it->yuv_p_ = enc->yuv_p_;
it->yuv_in_ = (uint8_t*)DO_ALIGN(it->yuv_mem_);
it->yuv_out_ = it->yuv_in_ + YUV_SIZE;
it->yuv_out2_ = it->yuv_out_ + YUV_SIZE;
it->yuv_p_ = it->yuv_out2_ + YUV_SIZE;
it->lf_stats_ = enc->lf_stats_;
it->percent0_ = enc->percent_;
it->y_left_ = (uint8_t*)DO_ALIGN(it->yuv_left_mem_ + 1);
@ -267,19 +268,21 @@ int VP8IteratorNext(VP8EncIterator* const it,
it->v_left_[i] = usrc[15 + i * BPS];
}
// top-left (before 'top'!)
it->y_left_[-1] = enc->y_top_[x * 16 + 15];
it->u_left_[-1] = enc->uv_top_[x * 16 + 0 + 7];
it->v_left_[-1] = enc->uv_top_[x * 16 + 8 + 7];
it->y_left_[-1] = it->y_top_[15];
it->u_left_[-1] = it->uv_top_[0 + 7];
it->v_left_[-1] = it->uv_top_[8 + 7];
}
if (y < enc->mb_h_ - 1) { // top
memcpy(enc->y_top_ + x * 16, ysrc + 15 * BPS, 16);
memcpy(enc->uv_top_ + x * 16, usrc + 7 * BPS, 8 + 8);
memcpy(it->y_top_, ysrc + 15 * BPS, 16);
memcpy(it->uv_top_, usrc + 7 * BPS, 8 + 8);
}
}
it->preds_ += 4;
it->mb_ += 1;
it->nz_ += 1;
it->y_top_ += 16;
it->uv_top_ += 16;
it->x_ += 1;
if (it->x_ == enc->mb_w_) {
VP8IteratorSetRow(it, ++it->y_);
@ -374,12 +377,12 @@ void VP8IteratorStartI4(VP8EncIterator* const it) {
it->i4_boundary_[i] = it->y_left_[15 - i];
}
for (i = 0; i < 16; ++i) { // top
it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i];
it->i4_boundary_[17 + i] = it->y_top_[i];
}
// top-right samples have a special case on the far right of the picture
if (it->x_ < enc->mb_w_ - 1) {
for (i = 16; i < 16 + 4; ++i) {
it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i];
it->i4_boundary_[17 + i] = it->y_top_[i];
}
} else { // else, replicate the last valid pixel four times
for (i = 16; i < 16 + 4; ++i) {

22
src/enc/vp8enci.h
View File

@ -74,7 +74,7 @@ typedef enum { // Rate-distortion optimization levels
// The predicted blocks can be accessed using offsets to yuv_p_ and
// the arrays VP8*ModeOffsets[];
// +----+ YUV Samples area. See VP8Scan[] for accessing the blocks.
// Y_OFF |YYYY| <- original samples (enc->yuv_in_)
// Y_OFF |YYYY| <- original samples ('yuv_in_')
// |YYYY|
// |YYYY|
// |YYYY|
@ -272,10 +272,10 @@ typedef struct {
typedef struct {
int x_, y_; // current macroblock
int y_stride_, uv_stride_; // respective strides
uint8_t* yuv_in_; // borrowed from enc_ (for now)
uint8_t* yuv_out_; // ''
uint8_t* yuv_out2_; // ''
uint8_t* yuv_p_; // ''
uint8_t* yuv_in_; // input samples
uint8_t* yuv_out_; // output samples
uint8_t* yuv_out2_; // secondary buffer swapped with yuv_out_.
uint8_t* yuv_p_; // scratch buffer for prediction
VP8Encoder* enc_; // back-pointer
VP8MBInfo* mb_; // current macroblock
VP8BitWriter* bw_; // current bit-writer
@ -297,7 +297,13 @@ typedef struct {
uint8_t* y_left_; // left luma samples (addressable from index -1 to 15).
uint8_t* u_left_; // left u samples (addressable from index -1 to 7)
uint8_t* v_left_; // left v samples (addressable from index -1 to 7)
uint8_t yuv_left_mem_[17 + 16 + 16 + 8 + ALIGN_CST]; // memory for *_left_
uint8_t* y_top_; // top luma samples at position 'x_'
uint8_t* uv_top_; // top u/v samples at position 'x_', packed as 16 bytes
// memory for storing y/u/v_left_ and yuv_in_/out_*
uint8_t yuv_left_mem_[17 + 16 + 16 + 8 + ALIGN_CST]; // memory for *_left_
uint8_t yuv_mem_[3 * YUV_SIZE + PRED_SIZE + ALIGN_CST]; // memory for yuv_*
} VP8EncIterator;
// in iterator.c
@ -441,10 +447,6 @@ struct VP8Encoder {
VP8MBInfo* mb_info_; // contextual macroblock infos (mb_w_ + 1)
uint8_t* preds_; // predictions modes: (4*mb_w+1) * (4*mb_h+1)
uint32_t* nz_; // non-zero bit context: mb_w+1
uint8_t* yuv_in_; // input samples
uint8_t* yuv_out_; // output samples
uint8_t* yuv_out2_; // secondary scratch out-buffer. swapped with yuv_out_.
uint8_t* yuv_p_; // scratch buffer for prediction
uint8_t *y_top_; // top luma samples.
uint8_t *uv_top_; // top u/v samples.
// U and V are packed into 16 bytes (8 U + 8 V)

13
src/enc/webpenc.c
View File

@ -176,7 +176,6 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config,
const size_t preds_size = preds_w * preds_h * sizeof(uint8_t);
const int top_stride = mb_w * 16;
const size_t nz_size = (mb_w + 1) * sizeof(uint32_t) + ALIGN_CST;
const size_t cache_size = (3 * YUV_SIZE + PRED_SIZE) * sizeof(uint8_t);
const size_t info_size = mb_w * mb_h * sizeof(VP8MBInfo);
const size_t samples_size = 2 * top_stride * sizeof(uint8_t) // top-luma/u/v
+ ALIGN_CST; // align all
@ -186,7 +185,6 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config,
uint8_t* mem;
const uint64_t size = (uint64_t)sizeof(VP8Encoder) // main struct
+ ALIGN_CST // cache alignment
+ cache_size // working caches
+ info_size // modes info
+ preds_size // prediction modes
+ samples_size // top/left samples
@ -197,14 +195,13 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config,
printf("===================================\n");
printf("Memory used:\n"
" encoder: %ld\n"
" block cache: %ld\n"
" info: %ld\n"
" preds: %ld\n"
" top samples: %ld\n"
" non-zero: %ld\n"
" lf-stats: %ld\n"
" total: %ld\n",
sizeof(VP8Encoder) + ALIGN_CST, cache_size, info_size,
sizeof(VP8Encoder) + ALIGN_CST, info_size,
preds_size, samples_size, nz_size, lf_stats_size, size);
printf("Transient object sizes:\n"
" VP8EncIterator: %ld\n"
@ -231,14 +228,6 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config,
enc->mb_w_ = mb_w;
enc->mb_h_ = mb_h;
enc->preds_w_ = preds_w;
enc->yuv_in_ = (uint8_t*)mem;
mem += YUV_SIZE;
enc->yuv_out_ = (uint8_t*)mem;
mem += YUV_SIZE;
enc->yuv_out2_ = (uint8_t*)mem;
mem += YUV_SIZE;
enc->yuv_p_ = (uint8_t*)mem;
mem += PRED_SIZE;
enc->mb_info_ = (VP8MBInfo*)mem;
mem += info_size;
enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_;